/*
  spr-sdk: Statistical Pattern Recognition SDK
  Copyright (C) 2010 Marco Ambu

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _PR_FSPACE_H
#define _PR_FSPACE_H

#include "pr/Pattern.h"

namespace pr {

class FeatureSpace
{
public:
  FeatureSpace();
  FeatureSpace(std::size_t numFeatures, const Pattern& eigenvalues, const std::vector<Pattern>& eigenvectors);

  const Pattern& eigenvalues() const { return eigenvalues_; }
  const Pattern& eigenvector(std::size_t i) const { return eigenvectors_[i]; }

//  util::Real transformPattern(Pattern& pattern) const;
  Pattern transformPattern(const Pattern& pattern, util::Real& distanceFromFeatureSpace) const;
    
private:
  std::size_t numFeatures_; // number of feature in the new space
  Pattern eigenvalues_;
  std::vector<Pattern> eigenvectors_;
};

} // namespace pr

#endif // _PR_FSPACE_H
